Beer, D. F. (1997). A guide to writing as an engineer. New York: John Wiley and Sons.
Chicago Style aipamenaBeer, David F. A Guide to Writing As an Engineer. New York: John Wiley and Sons, 1997.
MLA aipamenaBeer, David F. A Guide to Writing As an Engineer. New York: John Wiley and Sons, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.